var twoSum = function (nums, target) {
  var c = []
  for (let i = 0; i < nums.length; i++) {
    var a = target - nums[i];
    for (let j = i + 1; j <= nums.length; j++) {
      if (a == nums[j]) {
        c.push(i, j)
        return c
      }
      else continue
    }
  }
}
console.log(twoSum([-1, -2, -3, -4, -5], -8))